We don't have off limits food at our house, but do have a very strict rule about not eating outside the kitchen, so if my kids started to sneak food to their rooms that would be the conversation here (mice, bugs, just getting food on stuff in general). When we've had one kid hitting the snacks too hard, we just cut back on buying them for awhile and are vocal about why. We reiterate our pediatrician's one treat a day (and clarify that many things are treats, not just the obvious) rule, why our bodies need healthy fuel and say we won't buy those things if people are going to overdo it. Usually, if we take a few weeks off from any treats in the house, when they start to reappear, the problem doesn't recur for quite awhile. I think because a three or four week break cuts the sugar addiction. As the kids have gotten older, I do find myself overall buying a lot less packaged snack food. So if they get hungry, they usually just make themselves some real food and eat it in the kitchen.